Burkert 8223 Manuel Utilisateur page 7

- a 20 mA current indicates a conductivity which is equal to either:
- 1 mSiemens/cm (mS/cm)
- 10 mS/cm
- 100 mS/cm
- 1 S/cm
The conductivity depending on the material the used fitting is made of and its dia-
meter, the full scale value must be re-calculated using the following for mu la:
where FS = Full Scale value to be programmed on the PLC
FS
s
C
F
DN of the
Weld-ends / Internal and external threads
fitting
Brass
DN32 0.991
DN40 0.989
DN50 0.985
DN of the
fitting
Brass
DN65 -
DN80 -
DN100 -
- If a fitting with DN15, 20 or 25 is used, use the correction factor of the DN32
- If a fitting with a DN > 100 or a vessel is used, apply a correction factor = 1.
Example:
The 8223 sensor is installed in a PVDF S020 fitting with DN32.
The selected full scale is FS
The correction factor for this fitting is C
Thus: FS = FS
8223
CONFIGURATION
= selected Full Scale
= Correction factor of the fitting used: see the following tables
Stainless steel
0.989
0.989
0.983
Correction factor
Weld-ends
Stainless steel
0.993
0.995
0.998
= 10 mS/cm.
s
x C = 10 x 1,113 = 11,13 mS/cm
s F
FS = FS x C
s F
Correction factor
True-union / Solvent and fusion spigots
PVDF
1.113
1.049
1.022
Saddles
PVDF PP PVC
1.020 1.019 1.025
1.020 1.019 1.022
1.019 1.017 1.010
= 1,113.
F
7
PP PVC
1.098 1.093
1.045 1.045
1.021 1.022